I agree with Bullgrit, but I think he still holds this film in higher regard regard than me.
I gave this film, a 1-star rating, something I rarely do. Even despite best effort by Sam Worthington, I found this film to be rife with inconsistenices, incoherent, and near-unwatchable, an execrable addition to a franchise that should never have been revied without someone helming it who has a familiarity with the universe AND a unique vision to add to that universe. This film felt like an excercise in "groupthink." (YMMV, of course.)
More, this movie is, to me, a prime example of what plagues many movies made within the last two decades or so; it was an absolute triumph of style over substance.
The main problem? The film lacked the one defining quality that made Terminator and T2 stand-out from the standard "genre" movie: heart and emotionality. I lacked a real, tangible connection to any of the characters. (As an aside, I thought Sam Worthington stole this movie from Christian Bale; I found CB to be rather one-note in this film.)
A secondary problem? There was also no sense of "urgency" or "threat" to this film. (A problem I also find with the TV series.) Since this movie takes place prior to John sending Kyle back in the first place, we KNOW that neither John nor Kyle are in danger of dying, and [stellar performance aside] I wasn't invested enough in the new character to care if he lived or died.
And I gave up trying to deconstruct the timeline around the time T3 came out, but even so, this film seems to contradict not only itself, but the franchise in general. (Does the phrase "There is no fate but what we make" even mean anything anymore?? So, they BLOW UP Skynet Central [the big bad of the franchise], and yet John notes in the final lines "We won this battle, but the war rages on".... HUH??)
I think the other reason I have such negative feelings towards this move (aside from my "style over substance" rant a few paragraphs above) is that it could have been so much more than it was. [I'm not gonna dwell on the plethora of inconsistencies that litter this movie and trash the franchise; rather I'll point out some "could-have-been's" that might have saved this movie.])
In the opening crawl, they noted [paraphrase] "Some call John Connor a false prophet." And yet we NEVER see that in this movie; everyone loves him! What if they had made it so that Marcus was potentially the "savior" of the human race? (Yes, I know you'd piss off some purists, but it would be a viable new diretion to take this dying franchise.) What if he had followers from amongst the remants of the human race? Then you could have Kyle torn between his loyalties to John [Bringing the "fate" aspect back into play in a real way], and Marcus, who he actually bonded with, and who saved his life multiple times.
Sorry about the rant, everyone, but this movie totally affronted me to the point where I was literally left babblling at the end of it, it was so bad.